1935. Idealistic Catalonian educator Antoni Benaiges is appointed as the new schoolmaster of a small, isolated village in the province of Burgos. With an innovative approach, he soon wins over his reluctant pupils who are used to being instructed by the strict local priest. Inspiring his young charges to hope and to broaden their horizons, Antoni even promises to take them the ocean for the first time. Meanwhile, 75 years later, Ariadna is attempting to uncover what happened to her great grandfather Antoni.